Polypropylene film having good drawability in a wide temperature range and film properties
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United States of America Patent
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Jul 22, 2003
Grant Date -
Sep 26, 2002
app pub date -
Nov 28, 2001
filing date -
Dec 7, 2000
priority date (Note) -
Expired
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Abstract
The present invention provides polypropylene films and methods of making these films using high melt strength .beta.-crystalline polypropylene. The films of the present invention are opaque, porous and have good physical properties, such as being capable of cold drawing to a thin gauge without breaking.
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